电子科技大学学报
電子科技大學學報
전자과기대학학보
JOURNAL OF UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA
2010年
1期
16-20
,共5页
探地雷达%横向变波速%合成孔径成像%波速估计
探地雷達%橫嚮變波速%閤成孔徑成像%波速估計
탐지뢰체%횡향변파속%합성공경성상%파속고계
ground penetrating radar%lateral variable velocity%synthetic aperture imaging%velocity estimation
探地雷达应用中,由于土壤介质的影响,不同位置目标回波延时常常存在波动,传统的恒定波速成像算法不能修正这种波动,难以使成像性能达到最优.该文提出一种根据目标回波的曲线特征,快速估计横向等效波速,采用变波速F-K偏移进行合成孔径精确成像的新方法.实测数据处理结果显示该方法性能优于恒定波速成像.
探地雷達應用中,由于土壤介質的影響,不同位置目標迴波延時常常存在波動,傳統的恆定波速成像算法不能脩正這種波動,難以使成像性能達到最優.該文提齣一種根據目標迴波的麯線特徵,快速估計橫嚮等效波速,採用變波速F-K偏移進行閤成孔徑精確成像的新方法.實測數據處理結果顯示該方法性能優于恆定波速成像.
탐지뢰체응용중,유우토양개질적영향,불동위치목표회파연시상상존재파동,전통적항정파속성상산법불능수정저충파동,난이사성상성능체도최우.해문제출일충근거목표회파적곡선특정,쾌속고계횡향등효파속,채용변파속F-K편이진행합성공경정학성상적신방법.실측수거처리결과현시해방법성능우우항정파속성상.
The object's echo time delay often fluctuates in ground-penetrating radar (GPR) application due to the effect of soil. Such fluctuation can hardly be amended using the traditional algorithm with constant velocity to get the optimum image. A new method for precise SAR imaging is proposed by using the lateral variable velocity F-K migration in this paper. The equivalent lateral velocity can be fast estimated by the hyperbolic signatures of the echo. Experimental results show that the proposed method is more effective than the constant velocity migration.